Charoensuk, Jarruwat

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Preferred name
Charoensuk, Jarruwat
Alternative Name
Charoensuk, J.
Charoensuk, Jaruwat
Main Affiliation
Email
jarruwat.ch@kmitl.ac.th

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    Item type:Publication,
    CFD based Improvement of Thai Irrigation Pump
    (2020-01-01)
    Wasinarom, Kittipass
    ;
    Boonchauy, Dachdanai
    ;
    Charoensuk, Jarruwat
    Evaluation phase which was partial fulfilment of the beginning phase of "Development of Performance test rig and Efficiency improvement of impeller in Thai irrigation pump project" is presented in this paper. Overall flow field in the pump system that consisted of inlet, impeller and stator vane of the available pump was analyzed using commercial Computational Fluid Dynamics (CFD) code. The goal of this investigation is to obtain more understanding of energy dissipation which results from shear stress that developed within the flow field in each section of the pump. The improvement measure is then conducted with the concern of manufacturing difficulties. High dissipation flow structure was observed around the impeller outlet. Jet-wake and recirculation flow were observed. The first improvement measure was conducted by adding the bluff body in the flow channel to alleviate jet-wake structure and delay flow separation. After the implementation of the optimized bluff body around the impeller exit, CFD results indicated around 3-8% improvement compared with the CFD results of the available pump for the entire range of operating conditions.
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    TWO-DIMENSIONAL AXISYMMETRIC NUMERICAL STUDY OF THE PREMIXED COMBUSTION INSIDE THE POROUS MEDIA BURNER
    (2021-01-04)
    Vithean, K.
    ;
    Charoensuk, J.
    ;
    Hanamura, K.
    ;
    Sesuk, T.
    ;
    Lilavivant, V.
    Porous media combustion is one of the most efficient and has a wide-ranging application. Despite this, more investigation needs to be done in order to improve its efficiency and pollutant emission. In this research, the commercial simulation software is used to model and couple together the significant phenomena such as combustion, heat transfer, and fluid flow in porous media, which occur in this type of system. The free and porous media flow module was used to estimate fluid flow inside both fluid and porous media. Species formation and heat release during combustion were modeled by the transport of concentrated species module. Local thermal equilibrium was assumed for the energy equation and calculated by heat transfer in porous media module. Each physic was coupled together by two mechanisms—first, reaction flow, which coupled together between free and porous media flow and transport of concentrated species. Finally, nonisothermal flow coupled free and porous media flow with heat transfer in porous media. The combustion chamber, which is entirely filled with aluminum oxide pellets, is created for two dimensional axisymmetric. Physics-controlled mesh with finer element size is applied to generate mesh by the software to meet the specified need for each physic. Combustion behavior, velocity and temperature profile, and species formation are achieved from this simulation study.
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    CFD based Improvement of Thai Irrigation Pump
    (2020-08-31)
    Wasinarom, Kittipass
    ;
    Boonchauy, Dachdanai
    ;
    Charoensuk, Jarruwat
    Evaluation phase which was partial fulfilment of the beginning phase of "Development of Performance test rig and Efficiency improvement of impeller in Thai irrigation pump project" is presented in this paper. Overall flow field in the pump system that consisted of inlet, impeller and stator vane of the available pump was analyzed using commercial Computational Fluid Dynamics (CFD) code. The goal of this investigation is to obtain more understanding of energy dissipation which results from shear stress that developed within the flow field in each section of the pump. The improvement measure is then conducted with the concern of manufacturing difficulties. High dissipation flow structure was observed around the impeller outlet. Jet-wake and recirculation flow were observed. The first improvement measure was conducted by adding the bluff body in the flow channel to alleviate jet-wake structure and delay flow separation. After the implementation of the optimized bluff body around the impeller exit, CFD results indicated around 3-8% improvement compared with the CFD results of the available pump for the entire range of operating conditions.
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    Item type:Publication,
    Development of pulverized biomass combustion for industrial boiler: A study on bluff body effect
    (2019-08-01)
    Suksam, Niwat
    ;
    Charoensuk, Jarruwat
    Experimental and numerical investigations were performed for pure pulverized biomass combustion in a 300 kW laboratory swirl burner with a pre-combustion chamber. This work investigated a bluff body at the burner tip and how that affected the combustion characteristics in comparison with a conventional annular orifice burner. The combustion performances were assessed by measuring the temperature distribution in a pre-combustion chamber and furnace, oxygen concentration, and emissions (CO and NO<inf>x</inf>). Simulations were carried out and validated, providing insight on flow aerodynamics, particle trajectories, species concentrations, and temperature in a pre-combustion chamber and furnace. It was concluded that the bluff body provided a superior performance in terms of flame attachment and combustion efficiency. However, the emissions were high due to the contribution of thermal NO<inf>x</inf>.